This is an actively maintained fork of SoftPlugin.

Original Reddit post on r/Admincraft
Original Github README copied below

SoftPlugin is a thin loader; at runtime, it compiles Java source files and then loads a specific boot class.

Whilst the server is running, the source files can be changed and the plugin reloaded without restarting the server.

Rationale
This plugin tries to have these benefits of scripting plugins (e.g. Skript):

Rapid development; no need to build and deploy a jar
Rapid prototyping; new features or ideas can be quickly tried
Quick changes and fixes; IDE not needed to make changes, just a text editor and reload

By compiling Java sources into classes, it could use these benefits:

Requirements

Usage
Use Java source files with SoftPlugin at your own risk. Don't give SoftPlugin files you are unfamiliar with.
Setup

Upload SoftPlugin to the plugins directory of your server
Restart server
Check plugins/SoftPlugin/config.yml and change settings to taste
In the created source directory, create or place Java source files in typical layout. e.g, a file for class softplugin.Main should be in source/softplugin/Main.java
Execute /softplugin-reload in the server

Commands

Permissions

softplugin.reload - Allows use of /softplugin-reload. Granted to op and console.